feat: Add support for additional tools in Copilot (#11531)

- Added GetConversation, GetContact, GetArticle, SearchContacts,
SearchArticles
- Update SearchConversations to handle the permissions properly.

enterprise/app/services/captain/tools/base_service.rb

@@ -36,4 +36,18 @@ class Captain::Tools::BaseService
   def active?
     true
   end
+
+  private
+
+  def user_has_permission(permission)
+    return false if @user.blank?
+
+    account_user = AccountUser.find_by(account_id: @assistant.account_id, user_id: @user.id)
+    return false if account_user.blank?
+
+    return account_user.custom_role.permissions.include?(permission) if account_user.custom_role.present?
+
+    # Default permission for agents without custom roles
+    account_user.administrator? || account_user.agent?
+  end
 end